package com.interceptor;

import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;

import java.util.Map;

/**
 * @author CKC
 * @date 2022/12/28 10:05
 */
public class WebSocketInterceptor extends HttpSessionHandshakeInterceptor {
    @Override
    public boolean beforeHandshake(ServerHttpRequest request,
                                   ServerHttpResponse response, WebSocketHandler wsHandler,
                                   Map<String, Object> attributes) throws Exception {
        if (request instanceof ServletServerHttpRequest) {
            ServletServerHttpRequest serverHttpRequest = (ServletServerHttpRequest) request;
            // 获取参数
            String userId = serverHttpRequest.getServletRequest().getParameter(
                    "userId");
            attributes.put("currentUser", userId);
        }

        return true;
    }

    // 初次握手访问后
    @Override
    public void afterHandshake(ServerHttpRequest serverHttpRequest,
                               ServerHttpResponse serverHttpResponse,
                               WebSocketHandler webSocketHandler, Exception e) {

    }
}

